Bash : Delete some characters from a file with TR

in this little example of usage of the command tr
we want to clean a file so the values contained in it can be used
Example File

<10>
<23>
<34>
<78>
<44>
<12>
<40>
<81>
<30>
<11>
<14>
<09>
<02>
<66>

In my example i wish to only keep the value and deleting the character < and >

 cat file| tr -d '<>'

the tr command used with the -d (delete) option will allow you to delete the list of characters contained between the quotes.

You will obtain the following result